/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
 */
#if !defined(__CDCFTDI_H__)
#define __CDCFTDI_H__

#include "Usb.h"

#define bmREQ_FTDI_OUT  0x40
#define bmREQ_FTDI_IN   0xc0

//#define bmREQ_FTDI_OUT		USB_SETUP_HOST_TO_DEVICE|USB_SETUP_TYPE_CLASS|USB_SETUP_RECIPIENT_INTERFACE
//#define bmREQ_FTDI_IN		USB_SETUP_DEVICE_TO_HOST|USB_SETUP_TYPE_CLASS|USB_SETUP_RECIPIENT_INTERFACE

#define FTDI_VID			0x0403  // FTDI VID
#define FTDI_PID			0x6001  // FTDI PID

#define FT232AM				0x0200
#define FT232BM				0x0400
#define FT2232				0x0500
#define FT232R				0x0600

// Commands
#define FTDI_SIO_RESET 						0 /* Reset the port */
#define FTDI_SIO_MODEM_CTRL 				1 /* Set the modem control register */
#define FTDI_SIO_SET_FLOW_CTRL				2 /* Set flow control register */
#define FTDI_SIO_SET_BAUD_RATE				3 /* Set baud rate */
#define FTDI_SIO_SET_DATA					4 /* Set the data characteristics of the port */
#define FTDI_SIO_GET_MODEM_STATUS			5 /* Retrieve current value of modem status register */
#define FTDI_SIO_SET_EVENT_CHAR				6 /* Set the event character */
#define FTDI_SIO_SET_ERROR_CHAR				7 /* Set the error character */

#define FTDI_SIO_RESET_SIO					0
#define FTDI_SIO_RESET_PURGE_RX				1
#define FTDI_SIO_RESET_PURGE_TX				2

#define FTDI_SIO_SET_DATA_PARITY_NONE		(0x0 << 8 )
#define FTDI_SIO_SET_DATA_PARITY_ODD		(0x1 << 8 )
#define FTDI_SIO_SET_DATA_PARITY_EVEN		(0x2 << 8 )
#define FTDI_SIO_SET_DATA_PARITY_MARK		(0x3 << 8 )
#define FTDI_SIO_SET_DATA_PARITY_SPACE		(0x4 << 8 )
#define FTDI_SIO_SET_DATA_STOP_BITS_1		(0x0 << 11)
#define FTDI_SIO_SET_DATA_STOP_BITS_15		(0x1 << 11)
#define FTDI_SIO_SET_DATA_STOP_BITS_2		(0x2 << 11)
#define FTDI_SIO_SET_BREAK					(0x1 << 14)

#define FTDI_SIO_SET_DTR_MASK				0x1
#define FTDI_SIO_SET_DTR_HIGH				( 1 | ( FTDI_SIO_SET_DTR_MASK  << 8))
#define FTDI_SIO_SET_DTR_LOW				( 0 | ( FTDI_SIO_SET_DTR_MASK  << 8))
#define FTDI_SIO_SET_RTS_MASK				0x2
#define FTDI_SIO_SET_RTS_HIGH				( 2 | ( FTDI_SIO_SET_RTS_MASK << 8 ))
#define FTDI_SIO_SET_RTS_LOW				( 0 | ( FTDI_SIO_SET_RTS_MASK << 8 ))

#define FTDI_SIO_DISABLE_FLOW_CTRL			0x0
#define FTDI_SIO_RTS_CTS_HS					(0x1 << 8)
#define FTDI_SIO_DTR_DSR_HS					(0x2 << 8)
#define FTDI_SIO_XON_XOFF_HS				(0x4 << 8)

#define FTDI_SIO_CTS_MASK					0x10
#define FTDI_SIO_DSR_MASK					0x20
#define FTDI_SIO_RI_MASK					0x40
#define FTDI_SIO_RLSD_MASK					0x80

class FTDI;

class FTDIAsyncOper {
public:
        virtual uint8_t OnInit(FTDI *pftdi) = 0;
        virtual uint8_t OnRelease(FTDI *pftdi) = 0;
};


// Only single port chips are currently supported by the library,
//		so only three endpoints are allocated.
#define FTDI_MAX_ENDPOINTS					3

class FTDI : public USBDeviceConfig, public UsbConfigXtracter {
        static const uint8_t epDataInIndex; // DataIn endpoint index
        static const uint8_t epDataOutIndex; // DataOUT endpoint index
        static const uint8_t epInterruptInIndex; // InterruptIN  endpoint index

        FTDIAsyncOper *pAsync;
        USB *pUsb;
        uint8_t bAddress;
        uint8_t bConfNum; // configuration number
        uint8_t bNumIface; // number of interfaces in the configuration
        uint8_t bNumEP; // total number of EP in the configuration
        uint32_t qNextPollTime; // next poll time
        bool bPollEnable; // poll enable flag
        uint16_t wFTDIType; // Type of FTDI chip

        EpInfo epInfo[FTDI_MAX_ENDPOINTS];

        void PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr);

public:
        FTDI(USB *pusb, FTDIAsyncOper *pasync);

        uint8_t SetBaudRate(uint32_t baud);
        uint8_t SetModemControl(uint16_t control);
        uint8_t SetFlowControl(uint8_t protocol, uint8_t xon = 0x11, uint8_t xoff = 0x13);
        uint8_t SetData(uint16_t databm);

        // Methods for recieving and sending data
        uint8_t RcvData(uint16_t *bytes_rcvd, uint8_t *dataptr);
        uint8_t SndData(uint16_t nbytes, uint8_t *dataptr);

        // USBDeviceConfig implementation
        virtual uint8_t Init(uint8_t parent, uint8_t port, bool lowspeed);
        virtual uint8_t Release();
        virtual uint8_t Poll();

        virtual uint8_t GetAddress() {
                return bAddress;
        };

        // UsbConfigXtracter implementation
        virtual void EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *ep);

        virtual boolean VIDPIDOK(uint16_t vid, uint16_t pid) {
                return (vid == FTDI_VID && pid == FTDI_PID);
        }

};

#endif // __CDCFTDI_H__
